@mixin mountain($color: #12273e, $color2: #1d2f50) {
  position: absolute;
  inset-inline: 0;
  top: 14%;
  bottom: 42%;
  overflow: hidden;
  z-index: 10;
  &::before,
  &::after {
    content: "";
    position: absolute;
    width: 15vw;
    height: 15vw;
    background-color: $color;
    transform: rotate(-45deg);
    box-shadow: -3vw -3vw, 5vw 5vw, 10vw 10vw 0 3vw, 15vw 20vw 0 4vw,
      25vw 22vw 0 6vw, 25vw 30vw 0 11vw, 38vw 36vw 0 1vw, 41vw 39vw 0 3vw,
      45vw 45vw 0 2vw, 52vw 52vw 0 4vh, 55vw 55vw 0 1.5vw, 61vw 61vw 0 0.5vw,
      68vw 68vw 0 0;
  }
  &::before {
    filter: url("#filter");
    z-index: 2;
    top: 78%;
    color: $color;
  }
  &::after {
    left: 1%;
    top: 70%;
    color: $color2;
    z-index: 1;
    filter: url("#filter2");
  }
}
